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median-radial comparative studies

Median and radial nerves can be compared using several techniques mainly developed to assess the sensory median nerve conduction in the carpal tunnel. For example, in some methods, because the digit I (thumb) has median and radial innervation, the comparison of the latency of the evoked sensory nerve action potentials (SNAPs) by stimulation of both nerves can be an efficient method of establishing a relative slowing of the median nerve compared with the radial nerve across the wrist – short 10 cm segment, especially in mild carpal tunnel syndrome (CTS).